JavaScript Stringify

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[![NPM downloads][downloads-image]][downloads-url]
[![Build status][build-image]][build-url]
[![Build coverage][coverage-image]][coverage-url]

> Stringify is to eval as JSON.stringify is to JSON.parse.

Installation

``
npm install javascript-stringify --save
`

Usage

`javascript
import { stringify } from "javascript-stringify";
`

The API is similar JSON.stringify:

- value The value to convert to a string
- replacer A function that alters the behavior of the stringification process
- space A string or number that's used to insert white space into the output for readability purposes
- options
- maxDepth _(number, default: 100)_ The maximum depth of values to stringify
- maxValues _(number, default: 100000)_ The maximum number of values to stringify
- references _(boolean, default: false)_ Restore circular/repeated references in the object (uses IIFE)
- skipUndefinedProperties _(boolean, default: false)_ Omits undefined properties instead of restoring as undefined

$3

`javascript
stringify({}); // "{}"
stringify(true); // "true"
stringify("foo"); // "'foo'"

stringify({ x: 5, y: 6 }); // "{x:5,y:6}"
stringify([1, 2, 3, "string"]); // "[1,2,3,'string']"

stringify({ a: { b: { c: 1 } } }, null, null, { maxDepth: 2 }); // "{a:{b:{}}}"

/**
* Invalid key names are automatically stringified.
*/
stringify({ "some-key": 10 }); // "{'some-key':10}"

/**
* Some object types and values can remain identical.
*/
stringify([/.+/gi, new Number(10), new Date()]); // "[/.+/gi,new Number(10),new Date(1406623295732)]"

/**
* Unknown or circular references are removed.
*/
var obj = { x: 10 };
obj.circular = obj;

stringify(obj); // "{x:10}"
stringify(obj, null, null, { references: true }); // "(function(){var x={x:10};x.circular=x;return x;}())"

/**
* Specify indentation - just like JSON.stringify.
*/
stringify({ a: 2 }, null, " "); // "{\n a: 2\n}"
stringify({ uno: 1, dos: 2 }, null, "\t"); // "{\n\tuno: 1,\n\tdos: 2\n}"

/**
* Add custom replacer behaviour - like double quoted strings.
*/
stringify(["test", "string"], function (value, indent, stringify) {
if (typeof value === "string") {
return '"' + value.replace(/"/g, '\\"') + '"';
}

return stringify(value);
});
//=> '["test","string"]'
`

Formatting

You can use your own code formatter on the result of javascript-stringify. Here is an example using eslint:

`javascript
const { CLIEngine } = require("eslint");
const { stringify } = require("javascript-stringify");

const { APP_ROOT_PATH, ESLINTRC_FILE_PATH } = require("./constants");

const ESLINT_CLI = new CLIEngine({
fix: true,
cwd: APP_ROOT_PATH,
configFile: ESLINTRC_FILE_PATH,
});

module.exports = (objectToStringify) => {
return ESLINT_CLI.executeOnText(stringify(objectToStringify)).results[0]
.output;
};
``

License

MIT

[npm-image]: https://img.shields.io/npm/v/javascript-stringify
[npm-url]: https://npmjs.org/package/javascript-stringify
[downloads-image]: https://img.shields.io/npm/dm/javascript-stringify
[downloads-url]: https://npmjs.org/package/javascript-stringify
[build-image]: https://img.shields.io/github/workflow/status/blakeembrey/javascript-stringify/CI/main
[build-url]: https://github.com/blakeembrey/javascript-stringify/actions/workflows/ci.yml?query=branch%3Amain
[coverage-image]: https://img.shields.io/codecov/c/gh/blakeembrey/javascript-stringify
[coverage-url]: https://codecov.io/gh/blakeembrey/javascript-stringify